CV9 Master Catalog

6 Specifications subject to change without notice or incurring obligation 8-22-01 Option Specifications 6.8 Male Rod Thread Option -MR A high strength stud is threaded into the standard female rod end (see Option -P above) and retained with Loctite ® . This method eliminates the small diameter thread relief area normally required when machining male threads. This provides a much stronger rod end which can be re- paired, rather than replacing the complete rod, should the thread be damaged. Use in conjunction with Option -P above. A piston rod is incorporated in the driv- ing end. Two limit valves are mounted on thedrivingendheadandapiston rodguide and limit valveactuatorsareattached to the piston rod.The limit valves control a 3 or 4 waycontrol valve (not included, seeSection 11)which in turncontrols thebooster.When the system is “powered up” the booster strokes, raising the fluid pressure in the output end. When it fully strokes, a limit valve is actuated, reversing the booster, resetting it.When it is fully reset, the other limit valve is actuated shifting the control valve for another power stroke. This cycle continuesuntil theoutput pressure reaches the desired level. The booster then stalls out and holds that pressure until some of the fluid is used.Thebooster then resumes cycling until output fluid again reaches desired pressure and the booster stalls out. This cycling will continue as long as the system is “powered up.” During thestallmode there isnoenergy used, making the air powered booster an extremely efficient and quiet method of maintaining that highpressure.Ahydraulic power unit, for instance, requires continu- ous energy input. Because of the piston rod, the Power Factors change slightly as shown in the chart below. A typical circuit and sizing instructions are shown in example 1 on page 6.9. Use when the application requires pumping action (e.g. keeping a surge tank at high pressure for a test fixture) and/ or there is no electricity involved (e.g. an explosive atmosphere). Also see Option -E on page 6.7 for electronic position sen- sors. # Stages Theoretical Bore (Pistons) Power Factor 2 1.8 2-1/2 3 2.7 4 3.6 5 4.5 2 1.9 4 3 2.8 4 3.7 5 4.7 Piston Rod on Driving End Option -P H + Stroke L Wrench Flats G K Thread M J A A B B View A–A View B–B Pneumatic Continuous Cycling Option -L For details on the limit valves, which are included, see MSV-2 on page 13.5 Provisions for operator protection are always the full responsibility of the user. A piston rod is incorporated in the driv- ing end. Because of the piston rod area the Power Factor changes slightly.Use the Power Factors chartedabove forOption -L. Bore 2-1/2 4 G .19 .19 J ± .002 1.127 1.502 L 5/8 7/8 H .50 .50 K 1/2-20 x .75 1/2-20 x .75 M ± .001 0.750 1.000 Use for booster position indication. 1.00 Stud: 1/2 - 20 No relief No weakness Rod Loctite ®